a:8:{i:0;s:5:"ad_id";i:1;s:7:"ad_type";i:2;s:8:"ad_title";i:3;s:6:"ad_pic";i:4;s:6:"ad_url";i:5;s:7:"ad_sort";s:3:"_pk";s:5:"ad_id";s:5:"_type";a:6:{s:5:"ad_id";s:16:"int(11) unsigned";s:7:"ad_type";s:11:"varchar(20)";s:8:"ad_title";s:12:"varchar(100)";s:6:"ad_pic";s:12:"varchar(100)";s:6:"ad_url";s:12:"varchar(100)";s:7:"ad_sort";s:16:"int(11) unsigned";}}